Your network card has an ethernet connector on it does it not?
Anyway i set up a wireless network in my house last week.
I bought a netowrk adpater though, installed the software on my pc. I then rang up Belkins free 24/7 helpline.
Ok it took a while to get through, however once i did the guy on the other line was really helpful and had me set up on a wireless network in five mins.
If you know little of setting it up, i would strongly advice ringing Belkin.